US20190043645A1 - Wire bonding method - Google Patents
Wire bonding method Download PDFInfo
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- US20190043645A1 US20190043645A1 US16/045,837 US201816045837A US2019043645A1 US 20190043645 A1 US20190043645 A1 US 20190043645A1 US 201816045837 A US201816045837 A US 201816045837A US 2019043645 A1 US2019043645 A1 US 2019043645A1
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- wire
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0023—Apparatus or processes specially adapted for manufacturing conductors or cables for welding together plastic insulated wires side-by-side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/002—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating specially adapted for particular articles or work
- B23K20/004—Wire welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
- B23K20/106—Features related to sonotrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
- B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
- B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
- B23K20/2336—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer both layers being aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0036—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/32—Wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/38—Conductors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
Definitions
- the present invention relates to a wire bonding method, and particularly to a method of bonding conductors of a plurality of wires to each other.
- a plurality of conductors 3 a , 3 b , and 3 c are arranged side by side between a pair of dies aligned in a lateral direction, the conductors 3 a , 3 b , and 3 c are sandwiched between a hone and an anvil, aligned in the vertical direction, at a predetermined pressure P, and the hone is ultrasonically vibrated in a direction orthogonal to a paper surface of FIG. 9A , thereby ultrasonically bonding the conductors 3 a , 3 b , and 3 c to each other.
- JP 2007-509758 A can be listed as a technical literature relating to the related art.
- the conductors 3 a , 3 b , and 3 c are sandwiched between the hone and the anvil in the up-down direction of FIG. 9A in the conventional wire bonding method.
- the pressure in the lateral direction is not applied between the conductors that are adjacent in the lateral direction, that is, between the conductor 3 a and the conductor 3 b and between the conductor 3 b and the conductor 3 c .
- there is a problem that there is a risk of occurrence of bonding failure among the conductors 3 a , 3 b , and 3 c in the configuration of FIG. 9A .
- An object of the invention is to provide a wire bonding method capable of suppressing the occurrence of bonding failure between conductors in a wire bonding method and a wire arrangement tool for bonding exposed conductors of a plurality of wires.
- a wire bonding method includes: arranging a plurality of wires by inserting the wires with partially-exposed conductors into each groove of a wire arrangement tool provided with a plurality of grooves; and sandwiching the conductors of the plurality of wires arranged by the wire arrangement tool in a predetermined direction and bonding the conductors to each other. Further, in this wire bonding method, the sandwiching causes one arbitrary conductor among the conductors to receive a biasing force in a direction intersecting a direction of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among the conductors.
- a width of at least one groove among the plurality of grooves of the wire arrangement tool may be different from a width of the other grooves. Further, arranging of the plurality of wires may be a step for arranging the wires by inserting the wires having outer diameters matching the widths of the grooves, into the respective grooves of the wire arrangement tool.
- a depth direction of the groove may be a direction in which the conductor is sandwiched in the bonding of the conductors.
- the wire bonding method may further include: rotating the wire arrangement tool by a predetermined angle relatively to the sandwiching direction after arranging the plurality of wires and before the bonding of the conductors.
- the wire arrangement tool may be provided with an anti-slip piece configured to prevent the wire inserted into the groove from slipping out of the groove.
- a depth of at least one groove among the grooves of the wire arrangement tool may be different from a depth of the other grooves.
- the plurality of wires may be inserted into the grooves of the wire arrangement tool after installing an attachment on a bottom of the groove of the wire arrangement tool.
- the width of the groove of the wire arrangement tool may be configured to be freely adjustable.
- the sandwiching of the conductor may be performed by moving at least one sandwiching member between a pair of sandwiching members opposing each other in a direction in which a distance between the pair of sandwiching members decreases.
- the bonding of the conductors may be a step for bonding the conductors to each other by ultrasonic bonding.
- one of the sandwiching members may be an anvil and the other sandwiching member may be a hone.
- a thick conductor of the wire may be positioned on a side of the hone and a thin conductor of the wire may be positioned on a side of the anvil.
- a wire bonding method includes: arranging a plurality of wires; and sandwiching conductors of the plurality of wires arranged in a predetermined direction and bonding the conductors to each other. Further, in this wire bonding method, the sandwiching of the conductors causes one arbitrary conductor among the conductors to receive a biasing force in a direction intersecting a direction of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among the conductors.
- the wire bonding method according to the aspects of the invention suppress the occurrence of bonding failure between the exposed conductors of the plurality of wires in the wire bonding method and in the wire arrangement tool.
- FIG. 1A is a front view illustrating a schematic configuration of a wire arrangement tool according to an embodiment of the invention
- FIG. 1B is a view taken along an arrow IB in FIG. 1A ;
- FIG. 1C is a perspective view illustrating the schematic configuration of the wire arrangement tool according to the embodiment of the invention.
- FIG. 2A is a front view illustrating a state where wires are installed in the wire arrangement tool according to the embodiment of the invention
- FIG. 2B is a view taken along an arrow IIB in FIG. 2A ;
- FIG. 2C is a perspective view illustrating the state where the wires are installed in the wire arrangement tool according to the embodiment of the invention.
- FIG. 3A is a front view illustrating a state where the wire arrangement tool in which the wires are installed is rotated together with the wires and inclined in a wire bonding method according to an embodiment of the invention
- FIG. 3B is a perspective view illustrating the state where the wire arrangement tool in which the wires are installed is rotated together with the wires and inclined in the wire bonding method according to the embodiment of the invention
- FIG. 4 is a front view illustrating a state when inclining the wires and the wire arrangement tool and ultrasonically bonding conductors of the wires in the wire bonding method according to the embodiment of the invention
- FIG. 5A is a front view illustrating a wire arrangement tool according to a modified example
- FIG. 5B is an enlarged view of a part of FIG. 5A ;
- FIG. 5C is a view illustrating a state where wires are installed in the wire arrangement tool according to the modified example
- FIG. 6A is a front view illustrating a wire arrangement tool (wire arrangement tool n which wires are installed) according to a modified example
- FIG. 6B is a view illustrating a state where the wire arrangement tool illustrated in FIG. 6A is rotated and inclined;
- FIG. 7A is a perspective view illustrating attachments to be installed in the wire arrangement tool illustrated in FIGS. 1A to 1C ;
- FIG. 7B is a front view of the wire arrangement tool in which the attachments and the wires are installed;
- FIG. 8A is a view illustrating a wire arrangement tool according to a modified example in a state before a width of a groove in which wires are installed is adjusted;
- FIG. 8B is a view illustrating the wire arrangement tool according to the modified example in a state where the wires are installed and the width of the groove is adjusted;
- FIG. 9A is a front view illustrating an outline of ultrasonic bonding according to a comparative example
- FIG. 9B is a cross-sectional view taken along a line IXB-IXB in FIG. 9A ;
- FIG. 10A is a front view illustrating an outline of ultrasonic bonding using the wire arrangement tool according to the embodiment of the invention.
- FIG. 10B is a cross-sectional view taken along a line XB-XB in FIG. 10A ;
- FIG. 11A is a front view illustrating a configuration obtained by changing the number of conductors from an aspect illustrated in FIGS. 10A and 10B ;
- FIG. 11B is a front view illustrating a configuration obtained by changing the number of conductors from an aspect illustrated in FIGS. 9A and 9B .
- a wire bonding method is configured to bond conductors 3 of a plurality of wires 1 to each other, and includes a wire arrangement process (see FIGS. 2A to 2C and the like) and a bonding process (see FIG. 4 and the like). Details of the wire arrangement process and the bonding process will be described later.
- one predetermined horizontal direction in the space is an X direction XD
- one predetermined horizontal direction orthogonal to the X direction XD is a Y direction YD
- a direction (up-down direction) orthogonal to the X direction XD and the Y direction YD is a Z direction ZD.
- a longitudinal direction of the wire 1 is a front-rear direction FR
- one predetermined direction orthogonal to the front-rear direction FR is a width direction WD (lateral direction)
- FR and the width direction WD is a vertical direction VT (height direction).
- the width direction WD and the vertical direction VT become directions inclined obliquely with respect to the horizontal direction by rotating a wire arrangement tool (wire alignment tool) 5 (see FIG. 3A and the like) although details thereof will be described later.
- the wire 1 is constituted by a conductor (core wire) 3 and a sheath (insulator) 7 with which the conductor 3 is covered (coated) as illustrated in FIG. 2C and the like.
- the sheath 7 is removed over a predetermined length at a part (for example, one end) of the wire 1 in the longitudinal direction to expose the conductor 3 (a sheath removal process).
- the wire 1 has flexibility.
- a cross section of the wire 1 taken along a plane orthogonal to the longitudinal direction is formed in a predetermined shape such as a circular shape as illustrated in FIG. 2A and the like.
- the conductor 3 is constituted by, for example, a plurality of strands (not illustrated).
- the strand is formed in an elongated cylindrical shape with metal such as copper, aluminum, and an aluminum alloy.
- the conductor 3 is configured in a form in which the plurality of strands are twisted or a form in which the plurality of strands collectively extend in a straight line.
- a cross section of the conductor 3 is formed in a substantially circular shape as the plurality of strands is bundled with almost no gap.
- a cross section of the sheath 7 is formed in an annular shape having a predetermined width (thickness).
- the entire inner circumference of the sheath 7 is in contact with the entire outer circumference of the conductor 3 .
- the conductor 3 is constituted by a single strand.
- the sheath 7 is removed for each of the plurality of wires 1 having mutually different thicknesses and different diameters of the conductor 3 and the sheaths 7 .
- lengths of the sheaths 7 to be removed are equal to each other regardless of the thicknesses of the wires 1 (see FIG. 2C and the like).
- a plurality of grooves (wire arrangement grooves) q are provided in the wire arrangement tool 5 at predetermined slight intervals in the width direction WD of these grooves 9 (see FIG. 1A and the like).
- the plurality of wires 1 are arranged (aligned) by inserting (inserting and installing) the wire 1 , which has the conductor 3 partially exposed due to the removal of the sheath 7 in the sheath removal process, into each of the grooves 9 of the wire arrangement tool 5 (see FIGS. 2A, 2C , and the like).
- the groove 9 of the wire arrangement tool 5 is formed in a rectangular shape with an open upper end in a state where the width direction WD coincides with the Y direction YD and the vertical direction VD coincides with the Z direction ZD when viewed from the front-rear direction FR as illustrated in FIG. 1A and the like.
- Each of the plurality of grooves 9 has a depth direction along the up-down direction (Z direction ZD).
- the wire arrangement tool 5 is configured to include a flat plate-shaped bottom plate 11 and a plurality of flat plate-shaped side plates 13 .
- the side plates 13 form thin partition walls that separate the grooves 9 adjoining to each other.
- a thickness direction of the bottom plate 11 coincides with the vertical direction VT
- a thickness direction of each of the side plates 13 coincides with the width direction WD
- each of the side plates 13 is erected, for example, upward from the bottom plate 11 with a gap therebetween in the width direction WD to be provided integrally with the bottom plate 11 .
- a position of a front end of the bottom plate 11 and a position of a front end of each of the side plates 13 coincide with each other in the front-rear direction FR, and positions of upper ends of the side plates 13 coincide with each other in the up-down direction.
- a distance between the side plates 13 adjacent to each other in each side plate in the width direction WD is a width of the groove 9 .
- a value of the thickness of the side plate 13 is set to be smaller than a value of the width of the groove 9 and a value of a diameter of the conductor 3 of the wire 1 installed in the groove 9 .
- the conductors 3 of the wires 1 arranged in the wire arrangement process are sandwiched in a predetermined direction (for example, the vertical direction VT), and the conductors 3 are bonded (ultrasonically bonded, for example) to each other.
- a predetermined direction for example, the vertical direction VT
- the conductors 3 are arranged in the form of piled bales as viewed in the longitudinal direction (front-rear direction FR; X direction XD) of the wire 1 as illustrated in FIGS. 4, 10A, and 11A , and the like.
- the sandwiching in the bonding process causes one arbitrary conductor among the conductors 3 (any conductor among the conductors 3 ) to receive a biasing force in a direction intersecting a direction (for example, the up-down direction) of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among the conductors 3 .
- all of the conductors 3 are connected with the biasing forces by performing the sandwiching in the bonding process. That is, the second conductor is in contact with the first conductor 3 with the biasing force, and the third conductor is in contact with the second conductor 3 with the biasing force. In this manner, all of the conductors 3 are continuously in contact with each other with the biasing forces. Meanwhile, there are both a case where such contact with the biasing force is made in one way (to be described in detail later using FIG. 10A ) and a case where the contact is made with a detour (to be described in detail later using FIG. 11A ).
- the plurality of conductors 3 are installed in a rectangular space as viewed in the front-rear direction FR between a pair of members 15 opposing each other with a predetermined distance therebetween in the Y direction YD and between a pair of sandwiching members 17 opposing each other with a predetermined distance therebetween in the Z direction ZD as illustrated in FIG. 4 .
- surfaces of the pair of members 15 opposing each other are flat surfaces parallel to each other (flat surfaces orthogonal to the Y direction YD).
- surfaces of the pair of sandwiching members 17 opposing each other are flat surfaces parallel to each other (flat surfaces orthogonal to the Z direction ZD).
- the wire arrangement tool 5 and the members 15 and 17 are separated by a predetermined distance in the front-rear direction FR as a distal end of the exposed conductor 3 is sandwiched by the members 15 and 17 .
- the sandwiching of the conductor 3 in the bonding process is performed by moving at least one sandwiching member (for example, the sandwiching member 17 A) between the pair of sandwiching members 17 ( 17 A and 17 B), which oppose each other in the Z direction ZD, in a direction (Z direction ZD; downward direction) in which the distance between the pair of sandwiching members 17 decreases.
- the distance between the pair of members 15 may be suitably decreased.
- the conductors 3 When the conductors 3 are sandwiched in the bonding process, the conductors 3 exposed in a cantilever shape are elastically deformed (bent between the wire arrangement tool 5 and the member 15 or the sandwiching member 17 ) so that the conductors 3 are arranged in the form of piled bales and in contact with each other with the biasing forces as described above, as illustrated in FIGS. 10A and 11A .
- the conductors 3 are bonded to each other, for example, by ultrasonic bonding as described above. Therefore, the one sandwiching member 17 A is an anvil and the other sandwiching member is a hone 17 B.
- the hone 17 B vibrates in a direction VD (X direction XD) orthogonal to the paper surface of FIGS. 4, 10A, and 11A .
- a thick conductor 3 A is positioned on a side of the anvil 17 A in FIG. 4 , it is desirable that the thick conductor 3 A be positioned on a side of the hone 17 B and a thin conductor 3 D be positioned on the side of the anvil 17 A.
- the thick conductor 3 A is positioned on the side of the anvil 17 A and the thin conductor 3 D is positioned on the side of the hone 17 B, there is a case where strands of the thin wire are hardly pressed by the anvil 17 A depending on an aspect of the arrangement of the wire 1 .
- the side of the hone 17 B is a place where a pressure force is applied the most, and there is a risk that strands are cut due to excessive compression and vibration of the hone 17 B if the strands of the thin wire are positioned on the side of the hone 17 B.
- the thick conductor 3 A be positioned on the side of the hone 17 B and the thin conductor 3 D be positioned on the anvil 17 A side.
- a width of at least one groove among the grooves 9 is different from the width of the other grooves in the wire arrangement tool 5 .
- the wires 1 are arranged by inserting the wires 1 having outer diameters matching the widths of the grooves 9 , into the respective grooves 9 of the wire arrangement tool 5 .
- each of the grooves 9 of the wire arrangement tool 5 will be described.
- the widths of the respective grooves 9 are different from each other as the width of at least one groove is different from the width of the other grooves.
- a value of the width of each of the grooves 9 increases from one end toward the other end in the width direction WD of the wire arrangement tool 5 .
- it is configured such that “a value of a width of a groove 9 A positioned at the leftmost side ⁇ a value of a width of a groove 9 B which is the second from the left ⁇ a value of a width of a groove 9 C which is the third from the left ⁇ a value of a width of a groove 9 D positioned on the rightmost side”.
- it may be configured such that there are two or more grooves 9 having the same width.
- grooves having different width values may be randomly arranged in the width direction WD of the wire arrangement tool 5 although the value of the width of each of the grooves 9 increases from one end to the other end in the width direction WD of the wire arrangement tool 5 in the above description.
- the width direction WD becomes the Y direction YD and the vertical direction VT becomes the Z direction ZD, for example, as illustrated in FIGS. 2A to 2C .
- one or a plurality of the wires 1 are inserted into each of the grooves 9 from above the grooves 9 when arranging the plurality of wires 1 using the wire arrangement tool 5 .
- the wire 1 having the outer diameter matching the width of the groove 9 is inserted into the groove 9 as described above. That is, the value of the width of the groove 9 and the outer diameter of the wire 1 to be inserted into this groove 9 are equal to each other.
- the wires 1 having the values of the outer diameters equal to the values of the widths of the grooves 9 are inserted into all the grooves 9 of the wire arrangement tool 5 in FIG. 2A
- the wires 1 inserted into the groove 9 may have values of outer diameters slightly smaller than the value of the width of the groove 9 .
- the wires 1 it is unnecessary for the wires 1 to be inserted into all of the grooves 9 extending in the width direction WD, and the wire is not necessarily inserted into the groove 9 positioned at an end in the width direction WD, or the wire is not necessarily inserted into the groove 9 adjacent to the groove 9 positioned at the end in the width direction WD.
- the wire 1 is not inserted into the groove 9 A positioned at the leftmost side and the groove 9 B which is the second from the left, and the wire 1 may be inserted into the other grooves 9 C and 9 D.
- the wire 1 is not inserted into only the groove 9 (the groove 9 B or the groove 9 C) positioned in the middle in the width direction WD is not preferable.
- a position of a front end 7 A of the sheath 7 of the wire 1 and a position of a front end 5 A of the wire arrangement tool 5 coincide with each other, and the exposed conductor 3 protrudes forward from the front end 5 A of the wire arrangement tool 5 by a predetermined length.
- the positions of the respective front ends (distal ends) of the conductors 3 of the wires 1 coincide with each other.
- the position of the front end 7 A of the sheath 7 of the wire 1 may be positioned slightly forward of the position of the front end 5 A of the wire arrangement tool 5 , or the position of the front end 7 A of the sheath 7 of the wire 1 may be positioned inside the groove 9 of the wire arrangement tool 5 .
- the conductor 3 exposed due to removal of the sheath 7 may be positioned inside the groove 9 of the wire arrangement tool 5 in the wire arrangement state.
- the position of a front end of the conductor 3 is positioned at the front side F of the position of the front end 5 A of the wire arrangement tool 5
- the position of the front end 7 A of the sheath 7 is positioned at the slightly rear side R of the position of the rear end of the wire arrangement tool 5 .
- the outer diameter of the wire 1 becomes the outer diameter of the conductor 3 .
- the depth direction of the groove 9 whose upper side is opened becomes the up-down direction (Z direction ZD) in the wire arrangement process as already understood from FIGS. 2A and 4 . That is, the depth direction of the groove 9 becomes a direction in which the conductor 3 is sandwiched in the bonding process.
- the wire arrangement tool 5 in which the wire 1 has been installed is rotated by a predetermined angle relatively to the sandwiching direction (Z direction ZD) after arranging the wire 1 in the wire arrangement process and before the bonding in the bonding process (a rotation process).
- This rotation process is performed in order to arrange the respective conductors 3 in the form of piled bales.
- the width direction WD of the wire arrangement tool 5 is the Y direction YD
- the vertical direction VT of the wire arrangement tool 5 is the Z direction ZD in the wire arrangement process, as described above.
- a rotation center axis of the wire arrangement tool 5 in the rotation process is an axis extending in the front-rear direction FR, and a rotation angle of the wire arrangement tool 5 and the wire 1 in the rotation process is an angle at which the depth direction of the groove 9 (the vertical direction VT of the wire arrangement tool 5 ) obliquely intersects a movement direction (Z direction ZD) of the sandwiching member 17 .
- the rotation angle of the wire arrangement tool 5 and the wire 1 in the rotation process is an angle that causes the respective conductors 3 to be arranged in the form of piled bales after arranging the wires 1 in the wire arrangement process and before the bonding in the bonding process.
- the wire arrangement tool 5 and the wire 1 are rotated clockwise by a predetermined angle within a range of 10° to 90° from the state illustrated in FIG. 1A in the rotation process.
- the wire arrangement tool 5 and the wire 1 are rotated clockwise by a predetermined angle within a range of 30° to 70° from the state illustrated in FIG. 1A in the rotation process.
- the wire arrangement tool 5 and the wire 1 are rotated clockwise by a predetermined angle within a range of 40° to 50° from the state illustrated in FIG. 1A in the rotation process.
- the conductors 3 have the same diameter in order to facilitate understanding.
- no biasing force acts between a conductor 3 aa and a conductor 3 ba , between the conductor aha and a conductor 3 ca , and between the conductor 3 ca and a conductor 3 da
- no biasing force acts between a conductor 3 ab and a conductor 3 bb , between the conductor 3 bb and a conductor 3 cb , and between the conductor 3 cb and a conductor 3 db either.
- a biasing force acts between the conductor 3 aa and the conductor 3 ab
- a biasing force acts between the conductor 3 ab and the conductor 3 ac
- a direction of the biasing force received by the conductor 3 ab from the conductor 3 aa and a direction of the biasing force received by the conductor 3 ab from the conductor 3 ac coincide with the direction (Z direction ZD) of the force generated by the sandwiching member 17 .
- a biasing force acts between a conductor 3 a and a conductor 3 c
- a biasing force also acts between a conductor 3 b and the conductor 3 c . Therefore, it can be said that an arbitrary conductor among the conductors 3 receives the biasing force in the direction (oblique direction) intersecting the direction of the force applied by the sandwiching, from another conductor in contact with the arbitrary conductor.
- a biasing force acts between a conductor 3 aa and a conductor 3 ba
- a biasing force also acts between a conductor 3 ca and a conductor 3 da .
- the conductors 3 of the wires 1 can be collected in a stable state at the time of bonding the conductors 3 to each other.
- the respective conductors 3 are arranged in the form of piled bales, and the biasing force in the direction oblique to the direction of the force generated by the sandwiching of the sandwiching member 17 is generated between the conductors 3 which are in contact with each other.
- the bonding between the conductors 3 is accurately performed, and the occurrence of bonding failure between the conductors 3 can be suppressed.
- the width of at least one groove among the grooves 9 of the wire arrangement tool 5 is different from the width of the other grooves; and the wires 1 are arranged by inserting the wires 1 having the outer diameters matching the widths of the grooves 9 , into the respective grooves 9 of the wire arrangement tool 5 in the wire arrangement process.
- the wires 1 are arranged in the wire arrangement tool 5 so as not to rattle, and the conductors 3 of the wires 1 having different sizes can be accurately bonded to each other.
- the wire arrangement tool 5 is rotated by the predetermined angle relatively to the sandwiching direction in the rotation process after arranging the wires 1 in the wire arrangement process and before the bonding in the bonding process.
- the conductors 3 of the wires 1 into the form of piled bales only with the simple process of rotating the wire arrangement tool 5 in which the wires 1 are arranged.
- the wires 1 (the conductors 3 ) approach each other when the wires 1 are installed in each of the grooves 9 .
- the wire arrangement tool 5 illustrated in FIGS. 5A to 5C is provided with an anti-slip piece 19 configured to prevent a wire 1 inserted into a groove 9 from slipping out of the groove 9 .
- a plurality of the anti-slip pieces 19 are provided at a predetermined interval in the vertical direction VT (the interval approximately the same as a value of an outer diameter of the wire 1 ) with respect to the single groove 9 , for example.
- VT the interval approximately the same as a value of an outer diameter of the wire 1
- each of the wires 1 is prevented from slipping by each of the anti-slip pieces 19 .
- the anti-slip piece 19 is constituted by a pair of elastic pieces 21 , which are elongated as viewed in the front-rear direction FR.
- One elastic piece 21 between the pair of elastic pieces 21 obliquely protrudes from one side plate 13 constituting the groove 9 toward the center of the groove 9 toward a bottom plate 11 .
- the other elastic piece 21 between the pair of elastic pieces 21 is positioned at the same position as the one elastic piece 21 in the vertical direction VT, and protrudes obliquely from one side plate 13 constituting the groove 9 toward the center of the groove 9 toward the bottom plate 11 .
- the pair of elastic pieces 21 are elastically deformed, and the elastic pieces 21 restore to a certain extent to be, for example, a “U” shape when the wire 1 passes over the pair of elastic pieces 21 so that the wire 1 abuts on the elastic pieces 21 so as to prevent the wire 1 from slipping out of the groove 9 .
- the wire 1 installed in the groove 9 of the wire arrangement tool 5 is biased in the depth direction of the groove 9 by the anti-slip piece 19 .
- the anti-slip piece 19 it is possible to more reliably prevent the rattling of the wire 1 that has been once installed in the groove 9 .
- the elastic piece 21 may be made of the same material as the side plate 13 or the bottom plate 11 , or may be made of a different material.
- the elastic piece 21 may be configured separately from the side plate 13 or may be integrally molded with the side plate 13 and the bottom plate 11 .
- a depth of at least one groove among grooves 9 is different from a depth of the other grooves, for example, in order to arrange a plurality of wires 1 installed in the wire arrangement tool 5 in the form of piled bales.
- the depths of the grooves 9 are different from each other since the depth of at least one groove among the grooves 9 of the wire arrangement tool 5 is different from the depth of other grooves.
- positions of bottom surfaces of the grooves 9 are different from each other in the up-down direction if positions of upper ends of the grooves 9 in the up-down direction coincide with each other.
- the upper surface of the bottom plate 11 is inclined by a predetermined angle ⁇ with respect to the horizontal plane as viewed in the front-rear direction FR. As a result, a value of the depth of each of the grooves 9 increases from one end toward the other end in the width direction WD of the wire arrangement tool 5 .
- each of the grooves 9 decreases from one end to the other end in the width direction WD of the wire arrangement tool 5 in the above description, the value may increase conversely, or the grooves 9 having different depth values may be randomly arranged in the width direction WD of the wire arrangement tool 5 .
- bottom surface of the groove 9 is inclined obliquely with respect to the horizontal plane in the above description, the bottom surface of the groove 9 may be horizontal.
- the above-described rotation process may be omitted as long as it is possible to make the conductors 3 arranged in the form of piled bales by changing the depth of the groove 9 of the wire arrangement tool 5 .
- the rotation process is unnecessary depending on the arrangement state of the wires 1 so that it is possible to simplify the process when the installation of the wire 1 in the groove 9 of the wire arrangement tool 5 is completed in the state where the vertical direction VT of the wire arrangement tool 5 becomes the Z direction ZD.
- the wire 1 may be inserted into the groove 9 after installing an attachment (spacer) 23 illustrated in FIG. 7A at the bottom of the groove 9 of the wire arrangement tool 5 in the wire arrangement process.
- the attachment 23 is installed in order to make the depth of the groove 9 and the bottom surface of the groove 9 inclined. With the attachment 23 , it is possible to obtain substantially the same operational effect as the case of changing the depth of the groove 9 or the like as illustrated in FIGS. 6A and 6B .
- a shape of the attachment 23 may be a triangular prism shape (a triangular prism shape whose bottom surface is, for example, a right triangle), may be a quadrangular prism shape, may be a trapezoidal prism shape (a trapezoidal prism shape whose bottom surface is a trapezoid with one oblique side perpendicular to a lower base or an upper base), or may be a cylindrical shape.
- the attachment 23 installed inside the groove 9 is movable by applying a certain amount of force in the vertical direction VT (a direction away from the bottom plate 11 ) and the front-rear direction FR, but is not movable in the other directions by being blocked by the bottom plate 11 and the side plate 13 .
- the rotation process is unnecessary in some cases and the process can be simplified similarly to the case of changing the depth of the groove of the wire arrangement tool 5 .
- the attachment 23 is freely detachable from the wire arrangement tool 5 , and thus, it is easier to omit the rotation process if the form of the attachment 23 is changed in accordance with a size of the diameter of the wire 1 and the number of the wires 1 .
- the attachment 23 may be installed in the wire arrangement tool 5 illustrated in FIGS. 6A and 6B .
- the width of the groove 9 is freely adjustable (changeable) in the wire arrangement tool 5 as illustrated in FIGS. 8A and 8B . That is, the side plate 13 may be freely movable to be positioned in the width direction of the wire arrangement tool 5 with respect to the bottom plate 11 .
- the wires 1 having various diameters in the wire arrangement tool 5 without rattling.
- the wire 1 installed in the wire arrangement tool 5 rattles, but it is possible to install the wire 1 inside the groove 9 in the state without rattling as illustrated in FIG. 8B by making the value of the width of the groove 9 equal to the value of the outer diameter of the wire 1 .
- the elastic piece 21 illustrated in FIGS. 6A and 6B may be provided so as to be movable to be positioned with respect to the side plate 13 in the vertical direction VT.
- the above-described wire bonding method is an example of wire bonding methods including a wire arrangement process of arranging a plurality of wires and a bonding process of sandwiching conductors of the wires arranged in the wire arrangement process in a predetermined direction (for example, an up-down direction) and bonding the conductors to each other, in which the conductors are arranged in a form of piled bales as viewed in a longitudinal direction (front-rear direction FR) of the wire.
- a predetermined direction for example, an up-down direction
- a thick conductor is positioned on one side, for example as viewed in the front-rear direction FR at a portion where the conductors are bonded to each other, and a thickness of the conductor gradually decreases from one side to the other side.
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Abstract
A wire bonding method includes: arranging a plurality of wires by inserting the wires with partially-exposed conductors into each groove of a wire arrangement tool provided with a plurality of grooves; and sandwiching the conductors of the plurality of wires arranged by the wire arrangement tool in a predetermined direction and bonding the conductors to each other. Further, in this wire bonding method, the sandwiching causes one arbitrary conductor among the conductors to receive a biasing force in a direction intersecting a direction of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among the conductors.
Description
- This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2017-149823 (filing date: Aug. 2, 2017), the entire contents of which are incorporated herein by reference.
- The present invention relates to a wire bonding method, and particularly to a method of bonding conductors of a plurality of wires to each other.
- Conventionally, a wire bonding method of bonding conductors of a plurality of wires, which have the conductors exposed at one end in a longitudinal direction due to removal of a sheath, to each other by ultrasonic bonding, for example.
- In this bonding method, as illustrated in
FIGS. 9A and 9B , a plurality ofconductors conductors FIG. 9A , thereby ultrasonically bonding theconductors - Incidentally, JP 2007-509758 A can be listed as a technical literature relating to the related art.
- Meanwhile, the
conductors FIG. 9A in the conventional wire bonding method. InFIG. 9A , however, the pressure in the lateral direction is not applied between the conductors that are adjacent in the lateral direction, that is, between theconductor 3 a and theconductor 3 b and between theconductor 3 b and theconductor 3 c. Thus, there is a problem that there is a risk of occurrence of bonding failure among theconductors FIG. 9A . - This problem also arises in the case of bonding conductors to each other by a method other than the ultrasonic bonding.
- An object of the invention is to provide a wire bonding method capable of suppressing the occurrence of bonding failure between conductors in a wire bonding method and a wire arrangement tool for bonding exposed conductors of a plurality of wires.
- A wire bonding method according to a first aspect of the invention includes: arranging a plurality of wires by inserting the wires with partially-exposed conductors into each groove of a wire arrangement tool provided with a plurality of grooves; and sandwiching the conductors of the plurality of wires arranged by the wire arrangement tool in a predetermined direction and bonding the conductors to each other. Further, in this wire bonding method, the sandwiching causes one arbitrary conductor among the conductors to receive a biasing force in a direction intersecting a direction of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among the conductors.
- A width of at least one groove among the plurality of grooves of the wire arrangement tool may be different from a width of the other grooves. Further, arranging of the plurality of wires may be a step for arranging the wires by inserting the wires having outer diameters matching the widths of the grooves, into the respective grooves of the wire arrangement tool.
- When inserting the wire into the groove of the wire arrangement tool, a depth direction of the groove may be a direction in which the conductor is sandwiched in the bonding of the conductors. Further, the wire bonding method may further include: rotating the wire arrangement tool by a predetermined angle relatively to the sandwiching direction after arranging the plurality of wires and before the bonding of the conductors.
- The wire arrangement tool may be provided with an anti-slip piece configured to prevent the wire inserted into the groove from slipping out of the groove.
- A depth of at least one groove among the grooves of the wire arrangement tool may be different from a depth of the other grooves.
- The plurality of wires may be inserted into the grooves of the wire arrangement tool after installing an attachment on a bottom of the groove of the wire arrangement tool.
- The width of the groove of the wire arrangement tool may be configured to be freely adjustable.
- The sandwiching of the conductor may be performed by moving at least one sandwiching member between a pair of sandwiching members opposing each other in a direction in which a distance between the pair of sandwiching members decreases. Further, the bonding of the conductors may be a step for bonding the conductors to each other by ultrasonic bonding. At this time, one of the sandwiching members may be an anvil and the other sandwiching member may be a hone. Further, in the bonding of the conductors, a thick conductor of the wire may be positioned on a side of the hone and a thin conductor of the wire may be positioned on a side of the anvil.
- A wire bonding method according to a second aspect of the invention includes: arranging a plurality of wires; and sandwiching conductors of the plurality of wires arranged in a predetermined direction and bonding the conductors to each other. Further, in this wire bonding method, the sandwiching of the conductors causes one arbitrary conductor among the conductors to receive a biasing force in a direction intersecting a direction of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among the conductors.
- The wire bonding method according to the aspects of the invention suppress the occurrence of bonding failure between the exposed conductors of the plurality of wires in the wire bonding method and in the wire arrangement tool.
-
FIG. 1A is a front view illustrating a schematic configuration of a wire arrangement tool according to an embodiment of the invention; -
FIG. 1B is a view taken along an arrow IB inFIG. 1A ; -
FIG. 1C is a perspective view illustrating the schematic configuration of the wire arrangement tool according to the embodiment of the invention; -
FIG. 2A is a front view illustrating a state where wires are installed in the wire arrangement tool according to the embodiment of the invention; -
FIG. 2B is a view taken along an arrow IIB inFIG. 2A ; -
FIG. 2C is a perspective view illustrating the state where the wires are installed in the wire arrangement tool according to the embodiment of the invention; -
FIG. 3A is a front view illustrating a state where the wire arrangement tool in which the wires are installed is rotated together with the wires and inclined in a wire bonding method according to an embodiment of the invention; -
FIG. 3B is a perspective view illustrating the state where the wire arrangement tool in which the wires are installed is rotated together with the wires and inclined in the wire bonding method according to the embodiment of the invention; -
FIG. 4 is a front view illustrating a state when inclining the wires and the wire arrangement tool and ultrasonically bonding conductors of the wires in the wire bonding method according to the embodiment of the invention; -
FIG. 5A is a front view illustrating a wire arrangement tool according to a modified example; -
FIG. 5B is an enlarged view of a part ofFIG. 5A ; -
FIG. 5C is a view illustrating a state where wires are installed in the wire arrangement tool according to the modified example; -
FIG. 6A is a front view illustrating a wire arrangement tool (wire arrangement tool n which wires are installed) according to a modified example; -
FIG. 6B is a view illustrating a state where the wire arrangement tool illustrated inFIG. 6A is rotated and inclined; -
FIG. 7A is a perspective view illustrating attachments to be installed in the wire arrangement tool illustrated inFIGS. 1A to 1C ; -
FIG. 7B is a front view of the wire arrangement tool in which the attachments and the wires are installed; -
FIG. 8A is a view illustrating a wire arrangement tool according to a modified example in a state before a width of a groove in which wires are installed is adjusted; -
FIG. 8B is a view illustrating the wire arrangement tool according to the modified example in a state where the wires are installed and the width of the groove is adjusted; -
FIG. 9A is a front view illustrating an outline of ultrasonic bonding according to a comparative example; -
FIG. 9B is a cross-sectional view taken along a line IXB-IXB inFIG. 9A ; -
FIG. 10A is a front view illustrating an outline of ultrasonic bonding using the wire arrangement tool according to the embodiment of the invention; -
FIG. 10B is a cross-sectional view taken along a line XB-XB inFIG. 10A ; -
FIG. 11A is a front view illustrating a configuration obtained by changing the number of conductors from an aspect illustrated inFIGS. 10A and 10B ; and -
FIG. 11B is a front view illustrating a configuration obtained by changing the number of conductors from an aspect illustrated inFIGS. 9A and 9B . - In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
- Description will be hereinbelow provided for embodiments of the present invention by referring to the drawings. It should be noted that the same or similar parts and components throughout the drawings will be denoted by the same or similar reference signs, and that descriptions for such parts and components will be omitted or simplified. In addition, it should be noted that the drawings are schematic and therefore different from the actual ones.
- A wire bonding method according to an embodiment of the invention is configured to bond
conductors 3 of a plurality ofwires 1 to each other, and includes a wire arrangement process (seeFIGS. 2A to 2C and the like) and a bonding process (seeFIG. 4 and the like). Details of the wire arrangement process and the bonding process will be described later. - Here, for convenience of description, it is assumed that one predetermined horizontal direction in the space is an X direction XD, one predetermined horizontal direction orthogonal to the X direction XD is a Y direction YD, and a direction (up-down direction) orthogonal to the X direction XD and the Y direction YD is a Z direction ZD.
- In addition, it is assumed that a longitudinal direction of the
wire 1 is a front-rear direction FR, one predetermined direction orthogonal to the front-rear direction FR is a width direction WD (lateral direction), and a direction orthogonal to the front-rear direction. FR and the width direction WD is a vertical direction VT (height direction). Incidentally, the width direction WD and the vertical direction VT become directions inclined obliquely with respect to the horizontal direction by rotating a wire arrangement tool (wire alignment tool) 5 (seeFIG. 3A and the like) although details thereof will be described later. - The
wire 1 is constituted by a conductor (core wire) 3 and a sheath (insulator) 7 with which theconductor 3 is covered (coated) as illustrated inFIG. 2C and the like. Thesheath 7 is removed over a predetermined length at a part (for example, one end) of thewire 1 in the longitudinal direction to expose the conductor 3 (a sheath removal process). - The
wire 1 has flexibility. In addition, a cross section of thewire 1 taken along a plane orthogonal to the longitudinal direction is formed in a predetermined shape such as a circular shape as illustrated inFIG. 2A and the like. - More specifically, the
conductor 3 is constituted by, for example, a plurality of strands (not illustrated). The strand is formed in an elongated cylindrical shape with metal such as copper, aluminum, and an aluminum alloy. - The
conductor 3 is configured in a form in which the plurality of strands are twisted or a form in which the plurality of strands collectively extend in a straight line. A cross section of theconductor 3 is formed in a substantially circular shape as the plurality of strands is bundled with almost no gap. - A cross section of the
sheath 7 is formed in an annular shape having a predetermined width (thickness). The entire inner circumference of thesheath 7 is in contact with the entire outer circumference of theconductor 3. Incidentally, there is also a case where theconductor 3 is constituted by a single strand. - In the sheath removal process, the
sheath 7 is removed for each of the plurality ofwires 1 having mutually different thicknesses and different diameters of theconductor 3 and thesheaths 7. Incidentally, lengths of thesheaths 7 to be removed are equal to each other regardless of the thicknesses of the wires 1 (seeFIG. 2C and the like). - A plurality of grooves (wire arrangement grooves) q are provided in the
wire arrangement tool 5 at predetermined slight intervals in the width direction WD of these grooves 9 (seeFIG. 1A and the like). - In the wire arrangement process, the plurality of
wires 1 are arranged (aligned) by inserting (inserting and installing) thewire 1, which has theconductor 3 partially exposed due to the removal of thesheath 7 in the sheath removal process, into each of thegrooves 9 of the wire arrangement tool 5 (seeFIGS. 2A, 2C , and the like). - The
groove 9 of thewire arrangement tool 5 is formed in a rectangular shape with an open upper end in a state where the width direction WD coincides with the Y direction YD and the vertical direction VD coincides with the Z direction ZD when viewed from the front-rear direction FR as illustrated inFIG. 1A and the like. Each of the plurality ofgrooves 9 has a depth direction along the up-down direction (Z direction ZD). - More specifically, the
wire arrangement tool 5 is configured to include a flat plate-shapedbottom plate 11 and a plurality of flat plate-shapedside plates 13. Theside plates 13 form thin partition walls that separate thegrooves 9 adjoining to each other. - A thickness direction of the
bottom plate 11 coincides with the vertical direction VT, a thickness direction of each of theside plates 13 coincides with the width direction WD, and each of theside plates 13 is erected, for example, upward from thebottom plate 11 with a gap therebetween in the width direction WD to be provided integrally with thebottom plate 11. - A position of a front end of the
bottom plate 11 and a position of a front end of each of theside plates 13 coincide with each other in the front-rear direction FR, and positions of upper ends of theside plates 13 coincide with each other in the up-down direction. - In addition, a distance between the
side plates 13 adjacent to each other in each side plate in the width direction WD is a width of thegroove 9. A value of the thickness of theside plate 13 is set to be smaller than a value of the width of thegroove 9 and a value of a diameter of theconductor 3 of thewire 1 installed in thegroove 9. - In the bonding process, the
conductors 3 of thewires 1 arranged in the wire arrangement process are sandwiched in a predetermined direction (for example, the vertical direction VT), and theconductors 3 are bonded (ultrasonically bonded, for example) to each other. - When the sandwiching is performed in the bonding process, the
conductors 3 are arranged in the form of piled bales as viewed in the longitudinal direction (front-rear direction FR; X direction XD) of thewire 1 as illustrated inFIGS. 4, 10A, and 11A , and the like. The sandwiching in the bonding process causes one arbitrary conductor among the conductors 3 (any conductor among the conductors 3) to receive a biasing force in a direction intersecting a direction (for example, the up-down direction) of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among theconductors 3. - In other words, all of the
conductors 3 are connected with the biasing forces by performing the sandwiching in the bonding process. That is, the second conductor is in contact with thefirst conductor 3 with the biasing force, and the third conductor is in contact with thesecond conductor 3 with the biasing force. In this manner, all of theconductors 3 are continuously in contact with each other with the biasing forces. Meanwhile, there are both a case where such contact with the biasing force is made in one way (to be described in detail later usingFIG. 10A ) and a case where the contact is made with a detour (to be described in detail later usingFIG. 11A ). - When sandwiching the
conductor 3 in the bonding process, first, the plurality ofconductors 3 are installed in a rectangular space as viewed in the front-rear direction FR between a pair ofmembers 15 opposing each other with a predetermined distance therebetween in the Y direction YD and between a pair of sandwichingmembers 17 opposing each other with a predetermined distance therebetween in the Z direction ZD as illustrated inFIG. 4 . - Surfaces of the pair of
members 15 opposing each other are flat surfaces parallel to each other (flat surfaces orthogonal to the Y direction YD). In addition, surfaces of the pair of sandwichingmembers 17 opposing each other are flat surfaces parallel to each other (flat surfaces orthogonal to the Z direction ZD). In addition, thewire arrangement tool 5 and themembers conductor 3 is sandwiched by themembers - Subsequently, the sandwiching of the
conductor 3 in the bonding process is performed by moving at least one sandwiching member (for example, the sandwichingmember 17A) between the pair of sandwiching members 17 (17A and 17B), which oppose each other in the Z direction ZD, in a direction (Z direction ZD; downward direction) in which the distance between the pair of sandwichingmembers 17 decreases. At this time, the distance between the pair ofmembers 15 may be suitably decreased. - When the
conductors 3 are sandwiched in the bonding process, theconductors 3 exposed in a cantilever shape are elastically deformed (bent between thewire arrangement tool 5 and themember 15 or the sandwiching member 17) so that theconductors 3 are arranged in the form of piled bales and in contact with each other with the biasing forces as described above, as illustrated inFIGS. 10A and 11A . - In the bonding process, the
conductors 3 are bonded to each other, for example, by ultrasonic bonding as described above. Therefore, the one sandwichingmember 17A is an anvil and the other sandwiching member is ahone 17B. Thehone 17B vibrates in a direction VD (X direction XD) orthogonal to the paper surface ofFIGS. 4, 10A, and 11A . - Although a
thick conductor 3A is positioned on a side of theanvil 17A inFIG. 4 , it is desirable that thethick conductor 3A be positioned on a side of thehone 17B and athin conductor 3D be positioned on the side of theanvil 17A. When thethick conductor 3A is positioned on the side of theanvil 17A and thethin conductor 3D is positioned on the side of thehone 17B, there is a case where strands of the thin wire are hardly pressed by theanvil 17A depending on an aspect of the arrangement of thewire 1. In addition, the side of thehone 17B is a place where a pressure force is applied the most, and there is a risk that strands are cut due to excessive compression and vibration of thehone 17B if the strands of the thin wire are positioned on the side of thehone 17B. Thus, it is desirable that thethick conductor 3A be positioned on the side of thehone 17B and thethin conductor 3D be positioned on theanvil 17A side. - As illustrated in
FIG. 1A and the like, a width of at least one groove among thegrooves 9 is different from the width of the other grooves in thewire arrangement tool 5. - As illustrated in
FIG. 2A and the like, in the wire arrangement process, thewires 1 are arranged by inserting thewires 1 having outer diameters matching the widths of thegrooves 9, into therespective grooves 9 of thewire arrangement tool 5. - The width of each of the
grooves 9 of thewire arrangement tool 5 will be described. For example, the widths of therespective grooves 9 are different from each other as the width of at least one groove is different from the width of the other grooves. - In addition, a value of the width of each of the
grooves 9 increases from one end toward the other end in the width direction WD of thewire arrangement tool 5. For example, it is configured such that “a value of a width of agroove 9A positioned at the leftmost side<a value of a width of agroove 9B which is the second from the left<a value of a width of agroove 9C which is the third from the left<a value of a width of agroove 9D positioned on the rightmost side”. - Incidentally, it may be configured such that there are two or
more grooves 9 having the same width. For example, it may be configured such that “the value of the width of thegroove 9A positioned at the leftmost side=the value of the width of thegroove 9B which is the second from the left<the value of the width of thegroove 9C which is the third from the left<the value of the width of thegroove 9D positioned on the rightmost side” in thewire arrangement tool 5 illustrated inFIG. 1A . - Further, grooves having different width values may be randomly arranged in the width direction WD of the
wire arrangement tool 5 although the value of the width of each of thegrooves 9 increases from one end to the other end in the width direction WD of thewire arrangement tool 5 in the above description. - When arranging the plurality of
wires 1 using thewire arrangement tool 5, the width direction WD becomes the Y direction YD and the vertical direction VT becomes the Z direction ZD, for example, as illustrated inFIGS. 2A to 2C . In addition, one or a plurality of thewires 1 are inserted into each of thegrooves 9 from above thegrooves 9 when arranging the plurality ofwires 1 using thewire arrangement tool 5. At this time, thewire 1 having the outer diameter matching the width of thegroove 9 is inserted into thegroove 9 as described above. That is, the value of the width of thegroove 9 and the outer diameter of thewire 1 to be inserted into thisgroove 9 are equal to each other. - Here, a description will be given regarding the relationship between the
wire arrangement tool 5 and thewire 1 in a state (wire arrangement state) where thewires 1 have been inserted into therespective grooves 9 of thewire arrangement tool 5 and the arrangement (installation) has been completed with reference toFIG. 2A and the like. - In the wire arrangement state, a lower end of the
first wire 1 inserted into thegroove 9 is brought into contact with thebottom plate 11, and each of both ends in the width direction WD thereof is brought into contact with each of the pair ofside plates 13 positioned at both ends in the width direction WD of thegroove 9. A lower end of the second orsubsequent wire 1 inserted into thegroove 9 is brought into contact with thewire 1 which has been already inserted into thegroove 9, and each of both ends in the width direction WD thereof is brought into contact with each of theside plates 13 positioned at both the ends in the width direction WD of thegroove 9. As a result, thewire 1 having been inserted into thegroove 9 is restricted from moving in the downward direction, the width direction WD, and the front-rear direction FR so as to be hardly movable in such directions. - Although the
wires 1 having the values of the outer diameters equal to the values of the widths of thegrooves 9 are inserted into all thegrooves 9 of thewire arrangement tool 5 inFIG. 2A , thewires 1 inserted into thegroove 9 may have values of outer diameters slightly smaller than the value of the width of thegroove 9. Conversely, an aspect in which a diameter of thewire 1 before being inserted into thegroove 9 is slightly larger than the width of thegroove 9, and thewire 1 is slightly elastically deformed in a state where thewire 1 has been installed in thegroove 9 so that thewire 1 biases theside plates 13 on both sides of thegroove 9 may be provided. - Further, it is unnecessary for the
wires 1 to be inserted into all of thegrooves 9 extending in the width direction WD, and the wire is not necessarily inserted into thegroove 9 positioned at an end in the width direction WD, or the wire is not necessarily inserted into thegroove 9 adjacent to thegroove 9 positioned at the end in the width direction WD. - For example, in the
wire arrangement tool 5 illustrated inFIG. 1A , thewire 1 is not inserted into thegroove 9A positioned at the leftmost side and thegroove 9B which is the second from the left, and thewire 1 may be inserted into theother grooves wire 1 is not inserted into only the groove 9 (thegroove 9B or thegroove 9C) positioned in the middle in the width direction WD is not preferable. - The relationship between the
wire arrangement tool 5 and thewire 1 in the front-rear direction FR in the wire arrangement state will be described. - A position of a
front end 7A of thesheath 7 of thewire 1 and a position of afront end 5A of thewire arrangement tool 5 coincide with each other, and the exposedconductor 3 protrudes forward from thefront end 5A of thewire arrangement tool 5 by a predetermined length. The positions of the respective front ends (distal ends) of theconductors 3 of thewires 1 coincide with each other. - In the wire arrangement state, a portion of the
wire 1 covered with thesheath 7 is positioned inside thegroove 9 of thewire arrangement tool 5. Therefore, the outer diameter of thewire 1 described above becomes an outer diameter of thesheath 7. In addition, a portion of thewire 1 covered with thesheath 7 extends rearward from a rear end of thewire arrangement tool 5 in the wire arrangement state. - Meanwhile, in the wire arrangement state, the position of the
front end 7A of thesheath 7 of thewire 1 may be positioned slightly forward of the position of thefront end 5A of thewire arrangement tool 5, or the position of thefront end 7A of thesheath 7 of thewire 1 may be positioned inside thegroove 9 of thewire arrangement tool 5. - Further, only the
conductor 3 exposed due to removal of thesheath 7 may be positioned inside thegroove 9 of thewire arrangement tool 5 in the wire arrangement state. In this case, the position of a front end of theconductor 3 is positioned at the front side F of the position of thefront end 5A of thewire arrangement tool 5, and the position of thefront end 7A of thesheath 7 is positioned at the slightly rear side R of the position of the rear end of thewire arrangement tool 5. In addition, the outer diameter of thewire 1 becomes the outer diameter of theconductor 3. - Meanwhile, when the
wire 1 is inserted into thegroove 9 of thewire arrangement tool 5, the depth direction of thegroove 9 whose upper side is opened becomes the up-down direction (Z direction ZD) in the wire arrangement process as already understood fromFIGS. 2A and 4 . That is, the depth direction of thegroove 9 becomes a direction in which theconductor 3 is sandwiched in the bonding process. - In addition, the
wire arrangement tool 5 in which thewire 1 has been installed is rotated by a predetermined angle relatively to the sandwiching direction (Z direction ZD) after arranging thewire 1 in the wire arrangement process and before the bonding in the bonding process (a rotation process). This rotation process is performed in order to arrange therespective conductors 3 in the form of piled bales. - More specifically, the width direction WD of the
wire arrangement tool 5 is the Y direction YD, and the vertical direction VT of thewire arrangement tool 5 is the Z direction ZD in the wire arrangement process, as described above. - A rotation center axis of the
wire arrangement tool 5 in the rotation process is an axis extending in the front-rear direction FR, and a rotation angle of thewire arrangement tool 5 and thewire 1 in the rotation process is an angle at which the depth direction of the groove 9 (the vertical direction VT of the wire arrangement tool 5) obliquely intersects a movement direction (Z direction ZD) of the sandwichingmember 17. - In other words, the rotation angle of the
wire arrangement tool 5 and thewire 1 in the rotation process is an angle that causes therespective conductors 3 to be arranged in the form of piled bales after arranging thewires 1 in the wire arrangement process and before the bonding in the bonding process. - For example, the
wire arrangement tool 5 and thewire 1 are rotated clockwise by a predetermined angle within a range of 10° to 90° from the state illustrated inFIG. 1A in the rotation process. Preferably, thewire arrangement tool 5 and thewire 1 are rotated clockwise by a predetermined angle within a range of 30° to 70° from the state illustrated inFIG. 1A in the rotation process. More preferably, thewire arrangement tool 5 and thewire 1 are rotated clockwise by a predetermined angle within a range of 40° to 50° from the state illustrated inFIG. 1A in the rotation process. - Here, a description will be given in detail regarding the point that the sandwiching in the bonding process causes one arbitrary conductor among the
conductors 3 to receive the biasing force in a direction (oblique direction) intersecting the direction of the force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor with reference toFIGS. 9A, 10A, and 11A . - In
FIGS. 9A, 10A, and 11A , theconductors 3 have the same diameter in order to facilitate understanding. - In a comparative example illustrated in
FIG. 9A , when threeconductors 3 are sandwiched betweenmembers conductor 3 a and aconductor 3 b, and no biasing force acts between theconductor 3 b and aconductor 3 c either. Therefore, no biasing force acts among all theconductors 3. - Similarly, in a comparative example illustrated in
FIG. 11B , no biasing force acts between aconductor 3 aa and aconductor 3 ba, between the conductor aha and aconductor 3 ca, and between theconductor 3 ca and aconductor 3 da, and no biasing force acts between aconductor 3 ab and aconductor 3 bb, between theconductor 3 bb and aconductor 3 cb, and between theconductor 3 cb and aconductor 3 db either. - In addition, a biasing force acts between the
conductor 3 aa and theconductor 3 ab, and a biasing force acts between theconductor 3 ab and theconductor 3 ac. However, a direction of the biasing force received by theconductor 3 ab from theconductor 3 aa and a direction of the biasing force received by theconductor 3 ab from theconductor 3 ac coincide with the direction (Z direction ZD) of the force generated by the sandwichingmember 17. - Therefore, in the comparative examples illustrated in
FIGS. 9A and 11B , it is difficult to say that an arbitrary conductor among theconductors 3 receives the biasing force in the direction (oblique direction) intersecting the direction of the force applied by the sandwiching, from another conductor in contact with the arbitrary conductor. - In addition, it is difficult to say that all of the
conductors 3 are connected with the biasing forces in the comparative examples illustrated inFIGS. 9A and 11B . - On the other hand, in an aspect illustrated in
FIG. 10A in which theconductors 3 are arranged in the form of piled bales, a biasing force acts between aconductor 3 a and aconductor 3 c, and a biasing force also acts between aconductor 3 b and theconductor 3 c. Therefore, it can be said that an arbitrary conductor among theconductors 3 receives the biasing force in the direction (oblique direction) intersecting the direction of the force applied by the sandwiching, from another conductor in contact with the arbitrary conductor. - In addition, it can be said that all of the conductors 3 (3 a, 3 b, and 3 c) are connected with the biasing forces in the aspect illustrated in
FIG. 10A , and that the contact with the biasing forces among theconductor 3 a, theconductor 3 b, and theconductor 3 c is made in one way since no biasing force is generated between theconductor 3 a and theconductor 3 b. - In an aspect illustrated in
FIG. 1.1A in which theconductors 3 are arranged in the form of piled bales, for example, a biasing force acts between aconductor 3 aa and aconductor 3 ba, and a biasing force also acts between aconductor 3 ca and aconductor 3 da. Thus, it can be said that an arbitrary conductor among theconductors 3 receives the biasing force in the direction (oblique direction) intersecting the direction of the force applied by the sandwiching, from another conductor in contact with the arbitrary conductor. - In addition, it can be said that all of the conductors 3 (3 aa to 3 ec) are connected with the biasing forces in the aspect illustrated in
FIG. 11A , and that the contact with the biasing forces among theconductors 3 aa to 3 ec is made with a detour since theconductor 3 bb is connected to theconductor 3 ba with the biasing force between theconductor 3 ab and theconductor 3 cb. - According to the wire bonding method, since the
wires 1 are arranged using thewire arrangement tool 5, theconductors 3 of thewires 1 can be collected in a stable state at the time of bonding theconductors 3 to each other. - In addition, according to the wire bonding method, as the sandwiching in the bonding process is performed, the
respective conductors 3 are arranged in the form of piled bales, and the biasing force in the direction oblique to the direction of the force generated by the sandwiching of the sandwichingmember 17 is generated between theconductors 3 which are in contact with each other. Thus, the bonding between theconductors 3 is accurately performed, and the occurrence of bonding failure between theconductors 3 can be suppressed. - In addition, according to the wire bonding method, the width of at least one groove among the
grooves 9 of thewire arrangement tool 5 is different from the width of the other grooves; and thewires 1 are arranged by inserting thewires 1 having the outer diameters matching the widths of thegrooves 9, into therespective grooves 9 of thewire arrangement tool 5 in the wire arrangement process. Thus, thewires 1 are arranged in thewire arrangement tool 5 so as not to rattle, and theconductors 3 of thewires 1 having different sizes can be accurately bonded to each other. - In addition, according to the wire bonding method, the
wire arrangement tool 5 is rotated by the predetermined angle relatively to the sandwiching direction in the rotation process after arranging thewires 1 in the wire arrangement process and before the bonding in the bonding process. Thus, it is possible to arrange theconductors 3 of thewires 1 into the form of piled bales only with the simple process of rotating thewire arrangement tool 5 in which thewires 1 are arranged. - In addition, since the
respective grooves 9 are provided with the predetermined slight intervals in the width direction WD according to thewire arrangement tool 5, the wires 1 (the conductors 3) approach each other when thewires 1 are installed in each of thegrooves 9. As a result, it is possible to bond theconductors 3 to each other without increasing the length of the exposedconductor 3. - Next, a
wire arrangement tool 5 according to a modified example will be described with reference toFIGS. 5A to 5C . - The
wire arrangement tool 5 illustrated inFIGS. 5A to 5C is provided with ananti-slip piece 19 configured to prevent awire 1 inserted into agroove 9 from slipping out of thegroove 9. - A plurality of the
anti-slip pieces 19 are provided at a predetermined interval in the vertical direction VT (the interval approximately the same as a value of an outer diameter of the wire 1) with respect to thesingle groove 9, for example. When a plurality of thewires 1 are inserted into thesingle groove 9, for example, each of thewires 1 is prevented from slipping by each of theanti-slip pieces 19. - More specifically, the
anti-slip piece 19 is constituted by a pair ofelastic pieces 21, which are elongated as viewed in the front-rear direction FR. Oneelastic piece 21 between the pair ofelastic pieces 21 obliquely protrudes from oneside plate 13 constituting thegroove 9 toward the center of thegroove 9 toward abottom plate 11. In addition, the otherelastic piece 21 between the pair ofelastic pieces 21 is positioned at the same position as the oneelastic piece 21 in the vertical direction VT, and protrudes obliquely from oneside plate 13 constituting thegroove 9 toward the center of thegroove 9 toward thebottom plate 11. - When the
wire 1 is installed in thegroove 9, the pair ofelastic pieces 21 are elastically deformed, and theelastic pieces 21 restore to a certain extent to be, for example, a “U” shape when thewire 1 passes over the pair ofelastic pieces 21 so that thewire 1 abuts on theelastic pieces 21 so as to prevent thewire 1 from slipping out of thegroove 9. - Incidentally, the
wire 1 installed in thegroove 9 of thewire arrangement tool 5 is biased in the depth direction of thegroove 9 by theanti-slip piece 19. As a result, it is possible to more reliably prevent the rattling of thewire 1 that has been once installed in thegroove 9. - In addition, it is possible to prevent the
wire 1 from slipping out of thegroove 9 particularly during the rotation process by providing theanti-slip piece 19. - Incidentally, the
elastic piece 21 may be made of the same material as theside plate 13 or thebottom plate 11, or may be made of a different material. Theelastic piece 21 may be configured separately from theside plate 13 or may be integrally molded with theside plate 13 and thebottom plate 11. - Next, a
wire arrangement tool 5 according to another modified example will be described with reference toFIGS. 6A and 6B . - In the
wire arrangement tool 5 illustrated inFIGS. 6A and 6B , a depth of at least one groove amonggrooves 9 is different from a depth of the other grooves, for example, in order to arrange a plurality ofwires 1 installed in thewire arrangement tool 5 in the form of piled bales. - For example, the depths of the
grooves 9 are different from each other since the depth of at least one groove among thegrooves 9 of thewire arrangement tool 5 is different from the depth of other grooves. In this case, positions of bottom surfaces of thegrooves 9 are different from each other in the up-down direction if positions of upper ends of thegrooves 9 in the up-down direction coincide with each other. - This will be described in detail. The upper surface of the
bottom plate 11 is inclined by a predetermined angle θ with respect to the horizontal plane as viewed in the front-rear direction FR. As a result, a value of the depth of each of thegrooves 9 increases from one end toward the other end in the width direction WD of thewire arrangement tool 5. - Although there are no two or more grooves having the same depth in the above description, it may be configured such that there are two or more grooves having the same depth.
- In addition, although the value of the depth of each of the
grooves 9 decreases from one end to the other end in the width direction WD of thewire arrangement tool 5 in the above description, the value may increase conversely, or thegrooves 9 having different depth values may be randomly arranged in the width direction WD of thewire arrangement tool 5. - Further, although the bottom surface of the
groove 9 is inclined obliquely with respect to the horizontal plane in the above description, the bottom surface of thegroove 9 may be horizontal. - In addition, the above-described rotation process may be omitted as long as it is possible to make the
conductors 3 arranged in the form of piled bales by changing the depth of thegroove 9 of thewire arrangement tool 5. - Since the depth of at least one groove among the
grooves 9 is different from the depth of the other grooves according to thewire arrangement tool 5 illustrated inFIGS. 6A and 6B , the rotation process is unnecessary depending on the arrangement state of thewires 1 so that it is possible to simplify the process when the installation of thewire 1 in thegroove 9 of thewire arrangement tool 5 is completed in the state where the vertical direction VT of thewire arrangement tool 5 becomes the Z direction ZD. - In addition, as illustrated in
FIG. 7B , thewire 1 may be inserted into thegroove 9 after installing an attachment (spacer) 23 illustrated inFIG. 7A at the bottom of thegroove 9 of thewire arrangement tool 5 in the wire arrangement process. - The
attachment 23 is installed in order to make the depth of thegroove 9 and the bottom surface of thegroove 9 inclined. With theattachment 23, it is possible to obtain substantially the same operational effect as the case of changing the depth of thegroove 9 or the like as illustrated inFIGS. 6A and 6B . - As illustrated in
FIG. 7A , a shape of theattachment 23 may be a triangular prism shape (a triangular prism shape whose bottom surface is, for example, a right triangle), may be a quadrangular prism shape, may be a trapezoidal prism shape (a trapezoidal prism shape whose bottom surface is a trapezoid with one oblique side perpendicular to a lower base or an upper base), or may be a cylindrical shape. - The
attachment 23 installed inside thegroove 9 is movable by applying a certain amount of force in the vertical direction VT (a direction away from the bottom plate 11) and the front-rear direction FR, but is not movable in the other directions by being blocked by thebottom plate 11 and theside plate 13. - As the
attachment 23 is used in this manner, the rotation process is unnecessary in some cases and the process can be simplified similarly to the case of changing the depth of the groove of thewire arrangement tool 5. Further, theattachment 23 is freely detachable from thewire arrangement tool 5, and thus, it is easier to omit the rotation process if the form of theattachment 23 is changed in accordance with a size of the diameter of thewire 1 and the number of thewires 1. - Incidentally, the
attachment 23 may be installed in thewire arrangement tool 5 illustrated inFIGS. 6A and 6B . - In addition, it may be configured such that the width of the
groove 9 is freely adjustable (changeable) in thewire arrangement tool 5 as illustrated inFIGS. 8A and 8B . That is, theside plate 13 may be freely movable to be positioned in the width direction of thewire arrangement tool 5 with respect to thebottom plate 11. - As a result, it is possible to install the
wires 1 having various diameters in thewire arrangement tool 5 without rattling. For example, if the value of the outer diameter of thewire 1 is smaller than the value of the width of thegroove 9 as illustrated inFIG. 8A , thewire 1 installed in thewire arrangement tool 5 rattles, but it is possible to install thewire 1 inside thegroove 9 in the state without rattling as illustrated inFIG. 8B by making the value of the width of thegroove 9 equal to the value of the outer diameter of thewire 1. - Incidentally, the
elastic piece 21 illustrated inFIGS. 6A and 6B may be provided so as to be movable to be positioned with respect to theside plate 13 in the vertical direction VT. - The above-described wire bonding method is an example of wire bonding methods including a wire arrangement process of arranging a plurality of wires and a bonding process of sandwiching conductors of the wires arranged in the wire arrangement process in a predetermined direction (for example, an up-down direction) and bonding the conductors to each other, in which the conductors are arranged in a form of piled bales as viewed in a longitudinal direction (front-rear direction FR) of the wire.
- In addition, in a wire bonded body (not illustrated) manufactured by the above-described wire bonding method, the conductors of the plurality of wires in which a diameter of a conductor of at least one wire is different from a diameter of conductors of the other wires are bonded to each other, a thick conductor is positioned on one side, for example as viewed in the front-rear direction FR at a portion where the conductors are bonded to each other, and a thickness of the conductor gradually decreases from one side to the other side.
- Embodiments of the present invention have been described above. However, the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to the considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
- Moreover, the effects described in the embodiments of the present invention are only a list of optimum effects achieved by the present invention. Hence, the effects of the present invention are not limited to those described in the embodiment of the present invention.
Claims (9)
1. A wire bonding method comprising:
arranging a plurality of wires by inserting the wires with partially-exposed conductors into each groove of a wire arrangement tool provided with a plurality of grooves; and
sandwiching the conductors of the plurality of wires arranged by the wire arrangement tool in a predetermined direction and bonding the conductors to each other,
wherein the sandwiching causes one arbitrary conductor among the conductors to receive a biasing force in a direction intersecting a direction of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among the conductors.
2. The wire bonding method according to claim 1 , wherein
a width of at least one groove among the plurality of grooves of the wire arrangement tool is different from a width of the other grooves, and
arranging of the plurality of wires is a step for arranging the wires by inserting the wires having outer diameters matching the widths of the grooves, into the respective grooves of the wire arrangement tool.
3. The wire bonding method according to claim 1 , wherein
when inserting the wire into the groove of the wire arrangement tool, a depth direction of the groove is a direction in which the conductor is sandwiched in the bonding of the conductors,
wherein the wire bonding method further comprises
rotating the wire arrangement tool by a predetermined angle relatively to the sandwiching direction after arranging the plurality of wires and before the bonding of the conductors.
4. The wire bonding method according to claim 1 , wherein
the wire arrangement tool is provided with an anti-slip piece configured to prevent the wire inserted into the groove from slipping out of the groove.
5. The wire bonding method according to claim 1 , wherein
a depth of at least one groove among the grooves of the wire arrangement tool is different from a depth of the other grooves.
6. The wire bonding method according to claim 1 , wherein
the plurality of wires is inserted into the grooves of the wire arrangement tool after installing an attachment on a bottom of the groove of the wire arrangement tool.
7. The wire bonding method according to claim 1 , wherein
the width of the groove of the wire arrangement tool is configured to be freely adjustable.
8. The wire bonding method according to claim 1 , wherein
the sandwiching of the conductor is performed by moving at least one sandwiching member between a pair of sandwiching members opposing each other in a direction in which a distance between the pair of sandwiching members decreases,
the bonding of the conductors is a step for bonding the conductors to each other by ultrasonic bonding,
one of the sandwiching members is an anvil and the other sandwiching member is a hone, and
in the bonding of the conductors, a thick conductor of the wire is positioned on a side of the hone and a thin conductor of the wire is positioned on a side of the anvil.
9. A wire bonding method comprising:
arranging a plurality of wires; and
sandwiching conductors of the plurality of wires arranged in a predetermined direction and bonding the conductors to each other,
wherein the sandwiching of the conductors causes one arbitrary conductor among the conductors to receive a biasing force in a direction intersecting a direction of a force applied by the sandwiching, from another conductor in contact with the one arbitrary conductor among the conductors.
Applications Claiming Priority (2)
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JP2017-149823 | 2017-08-02 | ||
JP2017149823A JP6603692B2 (en) | 2017-08-02 | 2017-08-02 | Wire joining method |
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US20190043645A1 true US20190043645A1 (en) | 2019-02-07 |
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Family Applications (1)
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US16/045,837 Abandoned US20190043645A1 (en) | 2017-08-02 | 2018-07-26 | Wire bonding method |
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US (1) | US20190043645A1 (en) |
JP (1) | JP6603692B2 (en) |
DE (1) | DE102018212947A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07211166A (en) * | 1994-01-20 | 1995-08-11 | Sumitomo Wiring Syst Ltd | Wire harness laying method and jig for the same |
JPH0927221A (en) * | 1995-07-10 | 1997-01-28 | Reikemu:Kk | Water-proof binding method for wire |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0417927U (en) * | 1990-06-06 | 1992-02-14 | ||
JP3385980B2 (en) * | 1998-10-07 | 2003-03-10 | 住友電装株式会社 | Horn of ultrasonic welding machine |
JP2002369350A (en) * | 2001-06-08 | 2002-12-20 | Sumitomo Wiring Syst Ltd | Method of passing electric wire through grommet |
MXPA06004855A (en) | 2003-10-29 | 2006-07-06 | Schunk Ultraschalltechnik Gmbh | Method for welding conductors. |
JP4391312B2 (en) * | 2004-05-10 | 2009-12-24 | 古河電気工業株式会社 | Ultrasonic welding equipment |
JP4698428B2 (en) * | 2006-01-16 | 2011-06-08 | 矢崎総業株式会社 | Ultrasonic bonding method |
JP2010073475A (en) * | 2008-09-18 | 2010-04-02 | Yazaki Corp | Electric wire joint method and electric wire joint device |
-
2017
- 2017-08-02 JP JP2017149823A patent/JP6603692B2/en active Active
-
2018
- 2018-07-26 US US16/045,837 patent/US20190043645A1/en not_active Abandoned
- 2018-08-02 DE DE102018212947.9A patent/DE102018212947A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07211166A (en) * | 1994-01-20 | 1995-08-11 | Sumitomo Wiring Syst Ltd | Wire harness laying method and jig for the same |
JPH0927221A (en) * | 1995-07-10 | 1997-01-28 | Reikemu:Kk | Water-proof binding method for wire |
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JP2019029279A (en) | 2019-02-21 |
JP6603692B2 (en) | 2019-11-06 |
DE102018212947A1 (en) | 2019-02-07 |
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